Using a environment variable as a tag in docker image

[Zach Arnold]

After building a container in a previous step in bitbucket pipelines, I'd like to use it to run RSPEC tests. I'm using this, and can't figure out why it fails:

step:
    name: Rspec
    image:
      name: quay.io/ygrene/ruby-manager:${BITBUCKET_COMMIT}

Unless of course the reason is, that I cannot do that. In which case, I would make this a feature request.